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BRWH

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Question 1

A solution of NaF(aq) is added dropwise to a solution that is 0.0102 mol L-1 in Ba2+(aq). When the concentration of F-(aq) exceeds ________ mol L-1, BaF2(s) will precipitate. Neglect volume changes. For BaF2(s),
◦ 8.6 × 10-5
◦ 1.3 × 10-2
◦ 1.7 × 10-8
◦ 3.3 × 10-3
◦ 1.7 × 10-4

Question 2

A swimming pool was sufficiently alkaline so that the carbon dioxide absorbed from the air produced a solution in the pool that was 2 × 10-4 M in carbonate ion. If the pool originally contained 4 × 10-3 M Mg2+, 6 × 10-4 M Ca2+, and 8 × 10-7 M Fe2+, then the precipitate that was formed consisted of ________.
(Ksp values are: CaCO3, 4.7 × 10-9; MgCO3, 4.0 × 10-5; FeCO3, 2.0 × 10-11)
◦ only MgCO3
◦ only CaCO3
◦ only FeCO3
◦ only CaCO3 and FeCO3
◦ MgCO3, CaCO3, and FeCO3


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Marked as best answer by BRWH on Jul 8, 2021

ryhom

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BRWH

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Reply 2 on: Jul 8, 2021
Excellent


smrtceo

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Reply 3 on: Yesterday
Wow, this really help

 

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